File 286251: Original images: 300dpi, color djvu files approx. 2760 by 3650 pixels. Editing: re-sampled to 600dpi, converted to black and white tif files, de-skewed, and set uniform margins. File 510673: Original images: ca.300dpi, color jpg files approx. 3560 by 4640 pixels. Editing: re-sampled to 600dpi, converted to black and white tif files, de-skewed, and set uniform margins.